91Ó°ÊÓ

Sketch the line with the given slope and \(y\) -intercept. $$m=-0.3,(0,-1.4)$$

Solve the given systems of equations by determinants. All numbers are approximate. $$\begin{array}{l} 0.060 x+0.048 y=-0.084 \\ 0.065 y-0.13 x=0.078 \end{array}$$

Find the slope and \(y\) -intercept of the line with the given equation and sketch the graph using the slope and \(y\) -intercept. \(A\) calculator can be used to check your graph. $$y=-2 x+1$$

Solve each system of equations to the nearest 0.001 for each variable by using a calculator. $$\begin{aligned} &x-5 y=10\\\ &2 x-10 y=20 \end{aligned}$$

Solve the given systems of equations by either method of this section. $$\begin{aligned} &44 A=1-15 B\\\ &5 B=22+7 A \end{aligned}$$

Solve the given systems of equations by determinants. All numbers are approximate. $$\begin{array}{l} 301 x-529 y=1520 \\ 385 x-741 y=2540 \end{array}$$

Show that the given systems of equations have either an unlimited number of solutions or no solution. If there is an unlimited number of solutions, find one of them. $$\begin{aligned} &x-2 y-3 z=2\\\ &x-4 y-13 z=14\\\ &-3 x+5 y+4 z=0 \end{aligned}$$

Solve each system of equations to the nearest 0.001 for each variable by using a calculator. $$\begin{aligned} &18 x-3 y=7\\\ &2 y=1+12 x \end{aligned}$$

Find the slope and \(y\) -intercept of the line with the given equation and sketch the graph using the slope and \(y\) -intercept. \(A\) calculator can be used to check your graph. $$y=-4 x$$

Solve the given systems of equations by either method of this section. $$\begin{aligned} &60 x-40 y=80\\\ &2.9 x-2.0 y=8.0 \end{aligned}$$